James joseph francis mcdermott



{No Model.)

J. J. F. M DERMOTT. POWER TRANSMITTER FQR WINDMILLS.

Patented Apr. 28, l 8 96.-

' productiveness of the soil absolutely dependpump-rod continued fortwentywfour hours would raise as large a quantity of water as is .sota, have invented certain new and useful -ter possible within the shortest space of time,

short stroke on the power-rod into a longer JAMES JOSEPH FRANCIS MCDERMOTT,

or's'rfriiuntnnnuso'm, Assienonf or ONE-HALF TO ANTHONY venue, .in, or SAME PLACE.

POWERJRANSMITTER roambwithtsp SPECIFIGATION forming part of Letters latent No. 559,082, dated April 28, 1896'.

Application tea Au ust a, 1895.

To all whom, it mayconeerm Be it known that I, JAMES J osurn FRANCIS MCDERMOTT, a citizen of the United States, residing at St. Paul, Ramsey county, Minne- Improvements in Power-Transmitters for Windmills and the Like, of which the following is a specification.

This invention relates more especially to that class of devices knownas mechanical movements; and the object of the same is to produce a device of thiseharacter capable of attachment more particularly to a windmill and adapted to convert the usually short stroke of the rod driven by the wheel into a longer stroke of the pump-rod.

Water is the great desideratum on a farm, the life and health of man and beast and the ing on it. It is true that a short stroke of the possible by a stroke of double length con tinued for but twelve hours; but, as a steady wind-power cannot always be relied on, it is thepart of wisdom and economy to cause the rotation of the wheel to draw up all the waespecially during seasons of drought and while thewind is liable to die out completely at any time. To this end I have devised a mechanical movement which will convert a stroke on the pumprod. Moreover, it is well known that the sudden upward movement of the pump-rod and its valve as the, rod coinmences its upward stroke is injurious to the strongest pump and in time will necessitate repairs. To overcome this, various devices have been employed, including a stout spring interposed within the length of the rod. The device described below (whether the springs are used or not) effectually prevents all jerking on the rod by the use of weights which do not wear out or become affected byespanying drawings, in which Figure 1 is a side elevation of tlus improved device with the pump-rod at its highest point.

aura. 558,398. (No model.)

Fig. 2 is a similar view with the piimp-rod lowered and showing the toggle adjliistedto produce a stroke of different length.

' Referring to the said drawings, the letter T designates the windmilttower, and W the winr'twheel. From the latter the 'powenrod lit leads downward through the tower, as usual.

. P is a pump mounted above a suitable well,

cistern, or other source of water supply, and P R is the pump-rod thereof. Heretofore the power-rod R was connected directly or pivotally with the pump-rod P R, or possibly a stout spring was interposed between them to prevent jerking; but my invention consists -in interposmg atthis point a mechanical movement which notonly preveuts'jerking on the pump-rod, but also practically doubles the length oi the stroke thereof that is'to say, where the stroke of the power-rod R, produced by a small wheel, is about four inches, the use of my invention will impart a stroke to the pumprod P R of about eight inches, al-

though this distance can be varied by the adjusting means which I employ or any equivalent thereof,

Coming now to the present invention, the

numeral 1 designates a fork, clevis, or similar device to which the lower end of the powerrod is connected in any preferred manner,

and 2 2 are the arms of a togglapivoted at their upper ends to this fork and diverging downwardly.

3 is a support or block, preferably mounted on a eross-beam C in the tower, and 44 are what we will call the horizontal armsfl, ivoted at their inner ends to this block an ex tending nearly horizontally outward from opposite sides thereof. The bodies of these arms are provided with several holes 5 5, in which the lower ends of: the toggle members may be adjnstably pivoted, by the bolts (3 6, and their outer ends are forked, as at 7 Within the latter are pivoted the upper ends of two rods 8 8, which preferably curve slightly in ward and converge toward their lower ends, passing intermediate their ends between a double beam. B of the tower, and their lower extremities are pivoted to. a fork or clevis 9, wherein is secured the upper end of the pumprod, as shown.

10 is a link, preferably double, pivoted at its upper end at 11 to each arm 4., just inside its fork 7, extending thence downward and some cases springsmay also be used in this device, and I have shown them as applied thereto if desired.

"enter ends are caused tonse andran fora" in the drawings. lily preferred method of applying them is to locate a cross-arm 20 through the upper clevis 1,, and connect the springs 21 at their upper ends with the extremities of this arm, and at their lower ends with one of the holes 5 5 in the arms 4 4:, as shown, although obviously the springs might be attached at severalother points in the device,

device set to produce a short strokclj'of the pump-rod, and Fig.- 2 a long stroke,"-the latter end being efiected by moving the bolts 6 6 nearer' the center. In operation the crank wheel connected with the wind-wheel reciprocates the power-rod B through a distance of, say,'four inches. This causes the clevis 1 to rise and fall for that distance. The arms 4 are hence'moved on their pivots in the block 3 by the toggle 2, and their Fig. 1 shows the greater distance, the latter being regulated by the position of the bolts 6. The forks 7 at such outer ends raise and lower the rods 8,

and the latter move the lower clevis 9, which carries the pump-rod P R. As the power-rod 1 and pump-rod descend from the position of the two rods,

shown in Fig. 1 the descending arms d push downward on the links 10 and cause the weights 15 to rise, thus balancing the weight (and the springs 21, if employed, assist at this time,) and toward the lower end of the stroke the two weights swing inward over their fulo rums, so as to remove this balancing eifect from the rods and permit the crank in the wind-wheel mechanism to pass the dead-center at its lowest point.

i The use of the springs is of course optional with the mill-owner, and to that end 1 propose to supply the cross-M11120 with each upper clevis and the springs the1nselves,'and

leave it to his judgment whether to use them or not, according as the exigencies of each individual case shall demand.

All parts of the desired sizes, shapes, materials, and ornamentation, and considerable change from the exact construction described and of such length as to throw the weights may be made without departing from the spirit of my invention. It will be obvious that the device of itself may be employed in numerous other places and put to a variety of uses without losing'its identity as ameans for doubling the length of. a stroke, or,-

1. In a mechanical movement, the combination with a vertically-reciprocated upper clevis, a toggle pivoted thereto, port beneath the clevis, oted thereto, the lower ends of the toggle membersjbeing pivoted to such arms between divergent arms pivtheir ends, rods pivoted to the outer'ends of the arms and converging downward, and a lower clevis pivoted to the lower ends of the rods; of levers standing at oppositesides of said support and pivoted between their ends in suitable'fulcrums, weights at their outer ends, and outwardly-divergin g links pivotally connecting their inner ends with said arms over the levenfulcrums, substantially as de-- scribed.v

2. In a mechanical movement, the combi- I nation with a vertically-reciprocated upper clevis, a toggle pivoted thereto, a fixed sup port, divergent arms pivoted theretoand to "whose bodiesthe lower ends of the toggle members are pivoted, and rods leading from the outer ends oi. the arms downward to the work; of two weighted levers, links connecting their lighter ends with said arms, a cross arm through said clevis, and springs connecting the ends of this arm with the divergent arms, as and for the purpose set forth.

3. In a mechanical movement, the combination with a reciprocating clevis, a fixed support in line of its oted to the clevis, divergent arms pivoted to the support and to whose bodies the ends of the toggle members are pivoted, and rods leading from the outer ends of thcarms to .the work; of a cross-arm fixed through said clevis, and contractile springs connecting the ends of this arm with said divergent arms, as and for the purpose set forth. v

In testimony whereof I .have hereunto set reciprocation, a toggle pivmy hand in presence of two subscribing wit- I Witnesses:

LOUIS JOHN F. 'Bnrioo-EMAN. 

